arch/arm/mach-omap1/gpio16xx.c

   1 /*
   2  * OMAP16xx specific gpio init
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   5  *
   6  * Author:
   7  *      Charulatha V <charu@ti.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation version 2.
  12  *
  13  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  14  * kind, whether express or implied; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/gpio.h>
  20
  21 #define OMAP1610_GPIO1_BASE             0xfffbe400
  22 #define OMAP1610_GPIO2_BASE             0xfffbec00
  23 #define OMAP1610_GPIO3_BASE             0xfffbb400
  24 #define OMAP1610_GPIO4_BASE             0xfffbbc00
  25 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  26
  27 /* smart idle, enable wakeup */
  28 #define SYSCONFIG_WORD                  0x14
  29
  30 /* mpu gpio */
  31 static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
  32         {
  33                 .start  = OMAP1_MPUIO_VBASE,
  34                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  35                 .flags  = IORESOURCE_MEM,
  36         },
  37         {
  38                 .start  = INT_MPUIO,
  39                 .flags  = IORESOURCE_IRQ,
  40         },
  41 };
  42
  43 static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
  44         .revision       = USHRT_MAX,
  45         .direction      = OMAP_MPUIO_IO_CNTL,
  46         .datain         = OMAP_MPUIO_INPUT_LATCH,
  47         .dataout        = OMAP_MPUIO_OUTPUT,
  48         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  49         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  50         .irqenable_inv  = true,
  51         .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  52 };
  53
  54 static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = {
  55         .virtual_irq_start      = IH_MPUIO_BASE,
  56         .is_mpuio               = true,
  57         .bank_width             = 16,
  58         .bank_stride            = 1,
  59         .regs                   = &omap16xx_mpuio_regs,
  60 };
  61
  62 static struct platform_device omap16xx_mpu_gpio = {
  63         .name           = "omap_gpio",
  64         .id             = 0,
  65         .dev            = {
  66                 .platform_data = &omap16xx_mpu_gpio_config,
  67         },
  68         .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
  69         .resource = omap16xx_mpu_gpio_resources,
  70 };
  71
  72 /* gpio1 */
  73 static struct __initdata resource omap16xx_gpio1_resources[] = {
  74         {
  75                 .start  = OMAP1610_GPIO1_BASE,
  76                 .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
  77                 .flags  = IORESOURCE_MEM,
  78         },
  79         {
  80                 .start  = INT_GPIO_BANK1,
  81                 .flags  = IORESOURCE_IRQ,
  82         },
  83 };
  84
  85 static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
  86         .revision       = OMAP1610_GPIO_REVISION,
  87         .direction      = OMAP1610_GPIO_DIRECTION,
  88         .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
  89         .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
  90         .datain         = OMAP1610_GPIO_DATAIN,
  91         .dataout        = OMAP1610_GPIO_DATAOUT,
  92         .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
  93         .irqenable      = OMAP1610_GPIO_IRQENABLE1,
  94         .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
  95         .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
  96         .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
  97         .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
  98         .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
  99 };
 100
 101 static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
 102         .virtual_irq_start      = IH_GPIO_BASE,
 103         .bank_width             = 16,
 104         .regs                   = &omap16xx_gpio_regs,
 105 };
 106
 107 static struct platform_device omap16xx_gpio1 = {
 108         .name           = "omap_gpio",
 109         .id             = 1,
 110         .dev            = {
 111                 .platform_data = &omap16xx_gpio1_config,
 112         },
 113         .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
 114         .resource = omap16xx_gpio1_resources,
 115 };
 116
 117 /* gpio2 */
 118 static struct __initdata resource omap16xx_gpio2_resources[] = {
 119         {
 120                 .start  = OMAP1610_GPIO2_BASE,
 121                 .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
 122                 .flags  = IORESOURCE_MEM,
 123         },
 124         {
 125                 .start  = INT_1610_GPIO_BANK2,
 126                 .flags  = IORESOURCE_IRQ,
 127         },
 128 };
 129
 130 static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = {
 131         .virtual_irq_start      = IH_GPIO_BASE + 16,
 132         .bank_width             = 16,
 133         .regs                   = &omap16xx_gpio_regs,
 134 };
 135
 136 static struct platform_device omap16xx_gpio2 = {
 137         .name           = "omap_gpio",
 138         .id             = 2,
 139         .dev            = {
 140                 .platform_data = &omap16xx_gpio2_config,
 141         },
 142         .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
 143         .resource = omap16xx_gpio2_resources,
 144 };
 145
 146 /* gpio3 */
 147 static struct __initdata resource omap16xx_gpio3_resources[] = {
 148         {
 149                 .start  = OMAP1610_GPIO3_BASE,
 150                 .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
 151                 .flags  = IORESOURCE_MEM,
 152         },
 153         {
 154                 .start  = INT_1610_GPIO_BANK3,
 155                 .flags  = IORESOURCE_IRQ,
 156         },
 157 };
 158
 159 static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = {
 160         .virtual_irq_start      = IH_GPIO_BASE + 32,
 161         .bank_width             = 16,
 162         .regs                   = &omap16xx_gpio_regs,
 163 };
 164
 165 static struct platform_device omap16xx_gpio3 = {
 166         .name           = "omap_gpio",
 167         .id             = 3,
 168         .dev            = {
 169                 .platform_data = &omap16xx_gpio3_config,
 170         },
 171         .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
 172         .resource = omap16xx_gpio3_resources,
 173 };
 174
 175 /* gpio4 */
 176 static struct __initdata resource omap16xx_gpio4_resources[] = {
 177         {
 178                 .start  = OMAP1610_GPIO4_BASE,
 179                 .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
 180                 .flags  = IORESOURCE_MEM,
 181         },
 182         {
 183                 .start  = INT_1610_GPIO_BANK4,
 184                 .flags  = IORESOURCE_IRQ,
 185         },
 186 };
 187
 188 static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = {
 189         .virtual_irq_start      = IH_GPIO_BASE + 48,
 190         .bank_width             = 16,
 191         .regs                   = &omap16xx_gpio_regs,
 192 };
 193
 194 static struct platform_device omap16xx_gpio4 = {
 195         .name           = "omap_gpio",
 196         .id             = 4,
 197         .dev            = {
 198                 .platform_data = &omap16xx_gpio4_config,
 199         },
 200         .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
 201         .resource = omap16xx_gpio4_resources,
 202 };
 203
 204 static struct __initdata platform_device * omap16xx_gpio_dev[] = {
 205         &omap16xx_mpu_gpio,
 206         &omap16xx_gpio1,
 207         &omap16xx_gpio2,
 208         &omap16xx_gpio3,
 209         &omap16xx_gpio4,
 210 };
 211
 212 /*
 213  * omap16xx_gpio_init needs to be done before
 214  * machine_init functions access gpio APIs.
 215  * Hence omap16xx_gpio_init is a postcore_initcall.
 216  */
 217 static int __init omap16xx_gpio_init(void)
 218 {
 219         int i;
 220         void __iomem *base;
 221         struct resource *res;
 222         struct platform_device *pdev;
 223         struct omap_gpio_platform_data *pdata;
 224
 225         if (!cpu_is_omap16xx())
 226                 return -EINVAL;
 227
 228         for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
 229                 pdev = omap16xx_gpio_dev[i];
 230                 pdata = pdev->dev.platform_data;
 231
 232                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 233                 if (unlikely(!res)) {
 234                         dev_err(&pdev->dev, "Invalid mem resource.\n");
 235                         return -ENODEV;
 236                 }
 237
 238                 base = ioremap(res->start, resource_size(res));
 239                 if (unlikely(!base)) {
 240                         dev_err(&pdev->dev, "ioremap failed.\n");
 241                         return -ENOMEM;
 242                 }
 243
 244                 __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
 245                 iounmap(base);
 246
 247                 /*
 248                  * Enable system clock for GPIO module.
 249                  * The CAM_CLK_CTRL *is* really the right place.
 250                  */
 251                 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
 252                                         ULPD_CAM_CLK_CTRL);
 253
 254                 platform_device_register(omap16xx_gpio_dev[i]);
 255         }
 256
 257         return 0;
 258 }
 259 postcore_initcall(omap16xx_gpio_init);